I presume this price was to include all three differential seals. I will continue to monitor the head gasket since this is not a criticial issue (even they said I could let this go indefinitely) but am concerned about the differential seals. They indicated that I could let this go 3 months but definitely not longer than 6 months. What is your opinion blackmercedes? I trust your opinion based upon your other input on this board and would hate to damage the differential.